Hi!!! News about WeldFormFEM CPU/GPU code:
- Thermal coupled is being written!!
- Adding remeshing "skeleton"..
- Adding volumetric locking treatement
I have found an excelent LS-Dyna Element behavior. Such Benson 1992 states, Constant Stress Tetra/Triangle (CST) behaves overly stiff, but he do not propose a solution.
HOWEVER, comercial FEM Forming tools like DEFORM, FORGE & qFORM (Simufact works with FVM in 3D), works with tetras. However Locking Locking behavior in CST or HEXA elements typically arises in specific contexts, such as incompressible or nearly incompressible material behavior, bending-dominated problems, or mesh refinement with ill-conditioned elements. This can be volumetric locking of shear locking. Bonet (who also has done and still doing an extensive work with SPH), propose to implement an average pressure to overcome locking.
Hourglass models (or Zero energy modes) only affects hexas, and are observed in reduced integration elements (1 gauss point), and are deformation states in which central element gauss point presents null value but nodes don't.
Regarding to Hexa locking, I will delay a little bit the coding (see 20241122 entry) since I thinnk Tetra is straightforward.
Open Source Mechanics
20250116 - WeldFormFEM Tetras!!
Hi!!! News about WeldFormFEM CPU/GPU code:
- Thermal coupled is being written!!
- Adding remeshing "skeleton"..
- Adding volumetric locking treatement
I have found an excelent LS-Dyna Element behavior. Such Benson 1992 states, Constant Stress Tetra/Triangle (CST) behaves overly stiff, but he do not propose a solution.
HOWEVER, comercial FEM Forming tools like DEFORM, FORGE & qFORM (Simufact works with FVM in 3D), works with tetras. However Locking Locking behavior in CST or HEXA elements typically arises in specific contexts, such as incompressible or nearly incompressible material behavior, bending-dominated problems, or mesh refinement with ill-conditioned elements. This can be volumetric locking of shear locking. Bonet (who also has done and still doing an extensive work with SPH), propose to implement an average pressure to overcome locking.
Hourglass models (or Zero energy modes) only affects hexas, and are observed in reduced integration elements (1 gauss point), and are deformation states in which central element gauss point presents null value but nodes don't.
Regarding to Hexa locking, I will delay a little bit the coding (see 20241122 entry) since I thinnk Tetra is straightforward.
Check them in opensourcemech.com
#FEM #TETRA #HEXA #WeldForm #Hourglass #Locking
3 months ago (edited) | [YT] | 2